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This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
The high short-term radioactivity of spent nuclear fuel is primarily from fission products with short half-life.The radioactivity in the fission product mixture is mostly due to short-lived isotopes such as 131 I and 140 Ba, after about four months 141 Ce, 95 Zr/ 95 Nb and 89 Sr constitute the largest contributors, while after about two or three years the largest share is taken by 144 Ce/ 144 ...
The longest-lived radioisotope is 14 C, with a half-life of 5.70(3) × 10 3 years. This is also the only carbon radioisotope found in nature, as trace quantities are formed cosmogenically by the reaction 14 N + n → 14 C + 1 H. The most stable artificial radioisotope is 11 C, which has a half-life of 20.3402(53) min. All other radioisotopes ...
The New York Film Festival (NYFF) is a film festival held every fall in New York City, presented by Film at Lincoln Center. Founded in 1963 by Richard Roud and Amos Vogel with the support of Lincoln Center president William Schuman , NYFF is one of the longest-running and most prestigious film festivals in the United States. [ 1 ]
Opening Night: Hamlet (Grigori Kozintsev, USSR); Closing Night: The Big City (Satyajit Ray, India); Alone Across the Pacific (Kon Ichikawa, Japan); Band of Outsiders (Jean-Luc Godard, France)
Keep scrolling for all the longest standing ovations at the 2024 Cannes Film Festival so far: ‘The Substance’ Starring: Demi Moore, Margaret Qualley, Dennis Quaid, Ray Liotta
About 338 nuclides are found naturally on Earth. These comprise 251 stable isotopes, and with the addition of the 35 long-lived radioisotopes with half-lives longer than 100 million years, a total of 286 primordial nuclides, as noted above.
Spectators look up as the World Trade Center goes up in flames September 11, 2001 in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack.